Sickle-holder



2 Sheets-Sheet 1.

(No Model.) I I.

0. LEHMAN.

Sickle Holder.

. No. 239,259. Pate nted March 22,1881.

N.PETERS\ PHOTO-LITMOGXAPHER, WASHINGTON, C.

(No Model.) 1 2 Sheets-:Sheet 2.

C L E H M A N.

Sickle Holder.

' Patented March 22,1881.

1 w wmy/ 7 0 x Q p UNITED STATES PATENT OFFICE.

CHRISTIAN LEHMAN, OF ELGIN, IOWA.

SICKLE-HOLDER.

SPECIFICATION forming part of Letters Patent No. 239,259, dated March 22, 1881.

Application filed January 18, 1881. (No model.)

To all whom "it may concern:

Be it known that I, CHRISTIAN LEHMAN, a citizen of the United States, residing at El gin, in the county of Fayette and State of Iowa, have invented certain new and useful Improvements in Sickle-Holders; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad tothe accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to a device for adj ustably holding a sickle or cutter bar, such as are ordinarily used in reapers and mowers, to a grindstone; and the novelty consists in the construction and arrangement of parts, as will be more fully hereinafter set forth, and specifically pointed out in the several clauses of the claim. The bars mentioned are generally of (lifierentially-incli ned sides or cuttin g-surfaces, and require frequent grinding. To properly accomplish this grinding of the several cutting-inclines it is desirable, first, to hold the cutter-bar firmly, to give it a positive or arbitrary bevel; second, to adjust the holding mechanism to stones of different diameters; and, third, to have the holding mechanism of such construction that the act of sharpening the knives or cutters will wear the stone equally upon both edges.

The objects of the invention are, first, to adjust the cutter-holder laterally, vertically, and horizontally; second, to provide such adj ustability of the holder as will allow the stone to be worn equally upon either and both edges 5 and, third,to accommodate thecuttersto stones more or less worn. For these purposes I employ the device illustrated in the accompanying drawings, in which- Figure 1 is a perspective view, and Figs. 2 and 3 details.

Referring to the drawings, A represents a base-block adapted to be secured to the grindstone-frame, upon which is secured a standard,

B, having a cap-plate, B, perforated at b, and held to the base-block by thumb-screws 1). Around the circular standard B is a sleeve or collar, 0, which may be adjusted vertically at will by means of the set-screw c, and upon this collar rests looselya frame,D, of cast-iron, havplate f u on the serrated surface (I, andserves to allow an oscillating adjustability, as shown. The bar E is bifurcated at one extremity, and furnishes bearings at e for a pivotal shaft, 9, which connects the same to a jawed frame, G, preferably of cast metal, said frame G having a bearing-disk, G, upon which operates a similar disk, H, upon a bifurcated casting, H, and the said frames or castings G and H being adapted to be connected together by the friction of the faces of the disks G H, each against the other, and adjustably held at will in any desired position by a thumbscrew, h.

Pivoted at 7L2 to the casting H by a shaft, 2', is a frame, I, having bearing-arms i and a central arm, i A perforated ear, 2 receives a pin, 6 the said pin holding a handle, J, having a slot, j, which receives the ear 6 Upon the shaft 43 is arranged a cam-lever, K, which operates to hold the handle J in such proximity to the bearing-surfaces t" i as to clamp a cutter-bar between, and a set-screw, m, in the handle J allows an adjustment at will of said handle to accommodate different thicknesses of cutter-bars. It sometimes occurs that the sickle-bar, resting upon the arms 5 i, is so thin that the sweep of the cam will not force the handle J to clamp the bar, and

in such an emergency the adjusting-screw m is turned or screwed down until the point projects far enough to bear upon the bar. As the same bar has to be grasped or clamped many times in one operation, the adjustingscrew, properly set, and the cam-lever, which may be readily and quickly manipulated to clamp the bar, is of great importance, and a vast im-- provement over the screw-clamp.

It will be observed that I present differential adjustability by the holding device, in order to accommodate both the implement to be ground and the size of the revolving stone- 2'. e., first, the standard and adjustable rest al- 10W adjustability in a vertical direction; second, the serrated semicircular frame allows an oscillating adjustment; third, the bar E allows a horizontal adjustment; fourth, the operating-frame a swinging oscillating adj ustment; fifth, the frames G H, having disk-faces, allow lateral oscillating adjustment by means of set-screw h; sixth, the set-screwm and camlever K giving the proper clamp upon bars of different thicknesses, seventh, the slot and ear allowing a longitudinal motion of the handle J.

From the foregoing description the opera tion of the device will be obvious.

What I claim as new is- 1. The standard B, sleeve O c, and frame D (Z, combined with the frame F f, set-screw and adjusting means, f f and with sickle-holding means, as and for the purposes set forth.

2. The bar E, having semicircular and flat surfaces 6 0, combined with the segmental frame D d d, adjustable sleeve 0, standard B, and clamping mechanism, as specified.

3. The combination of the standard 13, adjustable collar 0 0, segment D d d, bar E, frame F f, sick1e-holding device, and means for adjusting the same, as herein set forth.

4. The handle J, having slot j and adjusting-screw m, combined with the frame I 11 i having ear 1' and pin 2', as and for the purposes set forth.

5. The handle J j and adjusting-screw m combined with the frame I i i i i and with the cam-lever K, as and for the purposes set forth.

6. The cam-clamp described, rendered adjustable by means of the adjusting-screw m, as shown, combined with the standard 13,001- lar O 0, segment D d d, and pivotal connections, as specified, for the purposes set forth.

7. The castings G and H, each having disksurfaces G H, combined with each other and with pivotal shaft g, set-screw h, and sickleholder, as specified.

S. The combination of the sickle-holding device 1 J K m, standard B, collar 0 c, segment D d 61, frame F, bar E, and pivotal connections, as and for the purposes set forth.

In testimony whereof I affix my signature in presence of two witnesses.

CHRISTIAN LEHMAN.

Witnesses: I

J. R. BUCHER, RUDOLPH W. Mosna. 

